JPH10286343A - Game ball detector for pinball game machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the manufacture and the installation, and accurately detect an improper deed by a method wherein the passing of game ball is detected by a change of the electric physical quantity when the game ball passes, and an improper deed is detected by sensing an electromagnetic wave, etc. SOLUTION: When a game ball B enters a ball passage of the gate part of a starting means, the game ball B passes a ball passing hole 27 of a game ball detector 24. At this time, a ball sensing part 31 senses the ball passing, and outputs a ball passing signal to a variation processing circuit through a ball detecting circuit 33 and a judging circuit 35. By this motion, the displayed pattern of a variable pattern display means varies. In the meantime, an improper deed sensing part 32 is away from the ball passing hole 27, and does not output an improper deed detecting signal when the game ball B passes. However, when an electromagnetic wave generates in the vicinity of a game machine, the ball sensing part 31 senses it and performs a wrong motion, and the improper deed sensing part 32 senses it at the same time, and outputs the improper deed detecting signal to the judging circuit 35 through an improper deed detecting circuit 34. Therefore, even if there is a ball detection, it becomes an improper deed, and becomes invalid.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a game ball detector for a ball game machine having a fraud detection function used in a ball game machine such as a pachinko machine, an arrangement ball machine and the like.

[0002]

2. Description of the Related Art In a ball game machine such as a pachinko machine, an arrangement ball machine or the like, an electromagnetically responsive game ball detector which responds in a contactless manner when a steel ball is won is used as a prize means of a game board. In use, when a game ball wins a prize means, a game ball is detected by a game ball detector, a payout means is operated, and a specified number of game balls are paid out as a prize ball by the payout means.

In a ball game machine using this kind of electromagnetically sensitive game ball detector as a winning means, when a device such as a transceiver that generates an electromagnetic wave is used in the vicinity thereof, the game ball detector is caused by the electromagnetic wave. A malfunction may occur in response. For this reason, some players take advantage of the drawbacks of game ball detectors that malfunction due to electromagnetic waves, such as so-called radio waves, to illegally operate the game ball detectors incorrectly and pay out game balls. There are malicious players who work.

Therefore, in a conventional ball-and-ball game machine, Japanese Patent Publication No.
As described in JP-A-44967, a winning ball is provided with a game ball detector, and a fraud detector operating according to the same operating principle as the game ball detector is not related to the ball passage of the game ball. There is a device which is disposed at a position, and when this fraud detector responds, it is determined that the fraudulent activity is caused by an electromagnetic wave generated from a transceiver or the like.

[0005]

In a conventional ball game machine, a game ball detector and a fraud detector are arranged in a winning means, and two detectors are always required. There is a drawback that the game ball detector is limited to a large prize unit having a size capable of arranging a game ball detector on the side and a fraud detector at a position away from the ball passage. For this reason, there is a disadvantage that a small game component such as a starting means that detects the passage of a game ball and starts the variable symbol display means cannot be adopted at all.

Further, since the two detectors are separately incorporated in the winning means, it is necessary to separately provide a mounting structure for the detector in the winning means, and the entire structure of the winning means including the two detectors is required. There is a disadvantage that it becomes complicated and the production cost is greatly increased. Furthermore, when assembling the winning means, the respective detectors must be separately assembled, so that the number of man-hours at the time of assembling increases and the work becomes complicated. In view of such conventional problems, the present invention can reliably detect illegal acts such as radio waves caused by electromagnetic waves, and can easily incorporate small game parts with a simple structure, and can be manufactured easily and at low cost. It is an object of the present invention to provide a game ball detector for a ball game machine that can be used.

[0007]

According to the first aspect of the present invention, there is provided a sphere detecting section 45 for detecting the passage of a game ball B by a change in an electric physical quantity when the game ball B passes, and an electromagnetic wave or a magnetic field. And a fraud detector 46 for detecting fraud based on a change in an electrical physical quantity when a response is made. The present invention according to claim 2 provides a ball detecting unit 45 that detects the passage of the game ball B by a change in the electrical physical quantity when the game ball B passes, and the game ball B that is insensitive to the passage of the game ball B. And a fraud detecting unit 46 that is arranged to be separated from the passage side of and detects fraud by a change in an electrical physical quantity based on the same operation principle as the ball detecting unit 45.

According to a third aspect of the present invention, there is provided the invention according to the first or second aspect, further comprising a discriminating circuit unit for discriminating an improper act when a detection signal is received from each of the detecting units 45 and 46. It is. According to a fourth aspect of the present invention, in the first aspect of the present invention, the ball detecting section 45 includes a ball sensing section 31 whose electric physical quantity changes when the game ball B passes.
Game ball due to the change in the electrical physical quantity of the ball sensing unit 31
A ball detection circuit unit 33 for detecting the passage of B, a fraud detection unit 46, a fraud detection unit 32 whose electrical physical quantity changes in response to an electromagnetic wave or a magnetic field, and an electric physical quantity of this fraud detection unit 32. And a fraud detection circuit unit 34 for detecting fraud by change.

According to a fifth aspect of the present invention, in the first aspect of the present invention, a sphere detecting section 45, a fraud detecting section 46 and a discriminating circuit section 35 are incorporated in the detector main body 26. It is false. The present invention described in claim 6 is the invention according to any one of claims 1 to 5, wherein
A ball passage hole 27 is formed at one end side in the longitudinal direction of the ball, a ball sensing unit 31 is arranged near the ball passage hole 27, and a fraudulent sensing unit 32 is arranged at the other end side away from the ball sensing unit 31. is there.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIGS. 1 to 6 show a first embodiment in which the present invention is applied to a ball and ball game machine. In FIG. 1, reference numeral 1 denotes a gaming machine main body, and a front frame 2 disposed in front of an outer frame.
The front frame 2 is openably and closably mounted on the outer frame via a pair of upper and lower hinges.

The front frame 2 has a vertically long rectangular window hole.
A lower plate 4 and a firing handle 6 for firing means 5 are mounted on the left and right sides of the window hole 3. In the front frame 2, a glass door 7 and an opening / closing plate 8 are vertically arranged in a window hole 3, and a game board 9 is detachably disposed behind the glass door 7 and the opening / closing plate 8. An upper plate 10 is mounted on the opening / closing plate 8, and game balls are supplied from the upper plate 10 to the firing position of the firing means 5 via ball feeding means. The firing means 5 hits the game ball supplied from the upper plate 10 when the firing handle 6 is operated, and
9 fired on the upper side.

A guide rail 43 for guiding a game ball is mounted on the game board 9 in a substantially annular shape, and an upper winning means 11, a variable symbol display means 12, a starting means 13, a left and right winning means 14, 15, game components such as a bottom winning unit 16, left and right bottom winning units 17 and 18, and a large winning unit 19 are mounted. The upper prize means 11, the left and right prize means 14, 15, the lower prize means 16, the left and right lower prize means 17, 18 and the large prize means 19 are opened at all times or under specific conditions so that the game ball can win. Each time one game ball wins, a payout means (not shown) is operated to pay out a specified number of game balls as prize balls. In addition, an out ball opening 20 is provided at a lower portion of the game board 9.

The variable symbol display means 12 includes a plurality of symbol display sections such as a liquid crystal display. When a display symbol of each of the symbol display sections fluctuates for a predetermined time and stops at a predetermined jackpot symbol, the large prize winning means 19 sets a predetermined symbol. Opening time to make it easier for game balls to win,
A profit state advantageous to the player is generated. The starting means 13 is for detecting the passing of the game ball B and for changing the display symbol of each symbol display section of the variable symbol display means 12, and is arranged near the lower side of the variable symbol display means 12.

As shown in FIGS. 2 and 3, the starting means 13 has a mounting base 21 which is in contact with the front surface of the game board 9, and is formed integrally with the mounting base 21 so as to project forward from the mounting base 21 and penetrate vertically. Gate section 23 having ball passage 22
A game ball detector 24 fitted horizontally from the mounting base 21 side so as to protrude into the ball passage 22 of the gate section 23.
And three light emitting diodes 25 that emit light when the game ball detector 24 detects a game ball B passing through the ball passage 22.

As shown in FIGS. 2 to 5, the game ball detector 24 has a flat rectangular detector main body 26 elongated in the front-rear direction, and a gate section at the front end side of the detector main body 26. 23, a ball passage hole 27 formed corresponding to the ball passage 22.The ball passage hole 27 is inserted into the mounting hole 27a of the mounting base 21 from the rear, and is inserted into the mounting hole 27a by the holding portion 28 and the locking claw 29. Removably locked.

In the detector main body 26, a hollow case portion 30 is provided on the rear side opposite to the ball passage hole 27.
30, a ball sensing unit 31 arranged near the rear of the ball passage hole 27
And the ball sensing unit 31 so as to be separated backward from the ball passage hole 27.
And a fraud detecting portion 32 disposed on the rear side opposite to the ball passage hole 27, and a ball detecting circuit portion 33 and a fraud detecting circuit behind the ball detecting portion 31 and the fraud detecting portion 32. The unit 34 and the discrimination circuit unit 35 are incorporated.

The ball detecting unit 31, the fraud detecting unit 32, the ball detecting circuit unit 33, the fraud detecting circuit unit 34, and the discriminating circuit unit 35 are incorporated in the hollow case 30 while being mounted on the printed circuit board 36. ing. The ball sensing unit 31 is an electromagnetic sensing type in which an electric physical quantity changes and senses when the game ball B passes through the ball passage hole 27, and the inductance changes when the game ball B passes through the ball passage hole 27. As shown in FIG.

The fraud sensing unit 32 is of an electromagnetically responsive type in which an electrical physical quantity changes according to the same operation principle as the ball sensing unit 31, and is constituted by a coil, similarly to the ball sensing unit 31 side. Then, the fraud sensing unit 32 controls the inductance so that the game ball B passing through the ball passage hole 27 does not change the inductance.
It is arranged to be spaced rearward from the ball passage hole 27 by a predetermined distance. The coils of the ball sensing unit 31 and the fraud sensing unit 32 are fixed to the printed circuit board 36 in a state of being molded by a soft synthetic resin mold material 37.

The ball detection circuit section 33 includes an oscillation circuit, a detection circuit, a waveform shaping circuit, and the like. When the game ball B passes through the ball passage hole 27, the inductance of the coil on the ball detection section 31 changes to oscillate. The circuit stops the oscillating operation, and the stop of the oscillating operation causes the waveform shaping circuit to output a detection signal of the game ball B.

The fraud detection circuit section 34 has the same configuration as the sphere detection circuit section 33, and responds to an electromagnetic wave or a magnetic field.
When the inductance of the 32 coils changes, the oscillating circuit stops oscillating, and the waveform shaping circuit outputs a fraud detection signal. In this embodiment, as shown in FIG. 6, a sphere detecting section 45 is constituted by the sphere detecting section 31 and the sphere detecting circuit section 33, and an illicit detecting section is constituted by the illicit detecting section 32 and the illicit detecting circuit section. 46 are configured.

The discrimination circuit section 35 is for discriminating between passing of the game ball B and cheating based on detection signals from the ball detection circuit section 33 and the fraud detection circuit section 34. When there is a signal and there is no detection signal from the fraud detection circuit section 34, it is determined that the game ball B has passed and a ball passing signal is output, and the detection signal is output from both the ball detection circuit section 33 and the fraud detection circuit section 34. When there is, the system is configured to judge that the act is fraudulent and output a fraudulent signal.

A terminal portion 38 is provided on the rear end side of the printed circuit board 36, and a lead wire 39 for the ball passing signal and the lead wire 39 for the fraud signal are connected to the terminal portion 38. Then, as shown in FIG. 6, the lead wire 39 for the ball passing signal is connected to the fluctuation processing circuit 40 of the fluctuation symbol display means 12 via a connector or the like,
A lead wire 39 for a fraudulent signal is provided via a connector or the like, fraudulent display means 41 such as fraudulent display means, fraudulent alarm means or the like, or a centralized management computer 42 for centrally managing each ball game machine.
It is connected to the. Note that the lead wire 39 is
One book may be provided individually, or one book may be provided in common and three books may be provided as a whole.

In the above-described ball game machine, when playing a game, a game ball supplied one by one from the upper plate 10 is fired.
Fire sequentially with 5. Then, the launched game balls are guided to the upper side of the game board 9 by the guide rail 43, and then fall down sequentially from the upper side while colliding with game nails and the like along the game board 9.

Then, while falling along the game board 9,
The game ball wins the winning prize means 11 etc. and is guided to the back side of the game board 9, or falls down to the lower part of the game board 9 without winning the prize winning means 11 etc. and from the out ball opening 20. You will be guided to the back of the game board 9. When a game ball wins the winning prize means 11 or the like, the payout means operates each time one game ball wins, and a specified number of game balls are paid out to the upper plate 10.

When the game ball B enters the ball passage 22 of the gate section 23 of the starting means 13, the game ball B passes through the ball passage hole 27 of the game ball detector 24 and falls downward. The ball sensing unit 31 responds when passing through, and the ball detection circuit unit 33 and the discrimination circuit unit 35
The ball passing signal is output to the fluctuation processing circuit 40 via the, and the display symbol of each symbol display section of the variable symbol display means 12 fluctuates, and after the display symbol fluctuates for a predetermined time, the display symbol stops.

That is, when the game ball B enters the ball passage 22 of the starting means 13, the game ball B passes through the ball passage hole 27 of the game ball detector 24.
The inductance of the side coil changes. Then, the ball detection circuit section 33 operates due to the change in the inductance, and outputs a detection signal to the discrimination circuit section 35.

On the other hand, the fraud sensing unit 32 is separated from the ball passage hole 27, and even if the game ball B passes through the ball passage hole 27, the coil inductance of the fraud sensing unit 32 does not change. The detection circuit section 34 does not output a detection signal. Therefore, when the game ball B passes through the ball passage hole 27, there is a detection signal from the ball detection circuit unit 33 and no detection signal from the fraud detection circuit unit 34, so that the discrimination circuit unit 35 It determines that the ball B has passed, and outputs a ball passing signal to the variation processing circuit 40, and the variation processing circuit 40 operates according to the ball passing signal, and the display symbols of each symbol display section of the variation symbol display means 12 start to vary. .

If the display symbol after the stop becomes a predetermined big hit symbol, the large winning means 19 is repeatedly opened, so that the game balls can be easily won. A condition occurs. When a player uses a transceiver or the like intentionally or negligently to generate electromagnetic waves in the vicinity of a ball game machine, the ball sensing unit 31 of the game ball detector 24
Is an electromagnetically responsive type, the ball sensing unit 31 responds to the electromagnetic wave, the inductance of the coil changes, and malfunctions in the same way as when the game ball B passes the starting means 13.

However, at this time, the electromagnetically sensitive fraud sensing unit 32 also simultaneously senses and sends a detection signal to the discrimination circuit unit 35 via the fraud detection circuit unit 34. Output cheating signal. That is, when an electromagnetic wave is generated, the inductance of the coil of the ball sensing unit 31 changes in response to the electromagnetic wave, but at the same time, the inductance of the coil of the fraud detecting unit 32 also changes. It works and outputs a detection signal to the discrimination circuit unit 35.

Therefore, when an electromagnetic wave is generated, there are detection signals from both the ball detection circuit section 33 and the fraud detection circuit section 34, and the detection signals are input to the discrimination circuit section 35. It determines that a fraud has occurred and outputs a fraud signal. Then, the fraudulent notification means 41 such as fraudulent display means, fraudulent alarm means and the like is operated by this fraudulent signal, and the occurrence of fraudulent behavior is displayed or alerted to the administrator to notify the administrator,
The centralized management computer 42 records and tabulates the occurrence of cheating for each ball-and-ball game machine.

The game ball detector 24 has a fraud detector 32, a ball detector 31 and a ball detector circuit 33 in the detector main body 26.
Since the fraud detection circuit unit 34 and the discrimination circuit unit 35 are incorporated, one game ball detector 24 can discriminate between passing of a game ball and fraudulent activity due to generation of electromagnetic waves. Therefore, it is possible to easily incorporate the game ball detector 24 having a fraud detection function into the small starting means 13 that simply passes the game ball, regardless of the small and large game components. By providing the game ball detector 24, the occurrence of fraudulent acts can be individually detected, and the fraudulent behavior can be prevented.

Since the game ball detector 24 is constructed by incorporating the ball detection unit 45, the fraud detection unit 46, and the discrimination circuit unit 35 in the detector main body 26, the game ball detector 24 is used as the starting means 13. In the case of mounting, it is only necessary to provide one mounting structure portion including the mounting hole 27a, the locking claw 29, and the like. it can.

In particular, since the ball detecting section 45, the fraud detecting section 46 and the discriminating circuit section 35 are incorporated in the detector main body 26 of the game ball detector 24, it is possible to determine whether or not one game ball detector 24 has a fraud. Everything up to the determination can be performed. For this reason, conventional detectors for detecting a game ball and for detecting fraud are separately provided, and each detector is required to be connected to an external determination means. Other handling is very easy, assembling of the entire game board 9, inspection after assembling, or maintenance in case of failure,
Inspections and the like can be performed easily and efficiently.

A ball passage hole 27 is formed at one end of the detector body 26 in the longitudinal direction, and a ball sensing unit 31 mounted on a printed circuit board 36 and a ball detection circuit are provided inside the detector body 26. Since the unit 33, the fraud detecting unit 32, the fraud detecting circuit unit 34, and the discriminating circuit unit 35 are incorporated, the detector main body 26 can be configured to be flat, easy handling at the time of assembling, etc., and the ball detecting unit 31, The fraud detector 32 and the like can be reliably protected from the outside by the detector main body 26. Moreover, since the ball sensing unit 31 and the fraud sensing unit 32 formed by the coils are molded on the printed board 36 by the soft synthetic resin mold material 37, damage due to vibration or the like can be prevented.

FIG. 7 illustrates a second embodiment of the present invention,
Arrange the ball sensing unit 31 on the ball passage hole 27 side of the printed board 36,
The fraudulent sensing unit 32 is arranged on the terminal 38 side opposite to the ball sensing unit 31. In this case, the ball detecting unit 31 and the fraud detecting unit 32 are located at both ends of the printed circuit board 36, and the fraud detecting unit 32 can be disposed far apart from the ball passage hole 27. For this reason, it becomes difficult for the fraud detecting section 32 to be sensitive to the game ball passing through the ball passage hole 27, and it is not necessary to set the threshold value of the ball detecting section 31 and the threshold value of the fraud detecting section 32 strictly. The circuit design of the circuit unit 33 and the fraud detection circuit unit 34 is facilitated, and the malfunction of the fraud sensing unit 32 due to the passing of the game ball can be reliably prevented.

In the case where the ball detecting section 31 and the fraud detecting section 32 are provided by slightly displacing the position of the ball passing hole 27 in the distance direction as in the first embodiment, the ball detecting section 31 and the fraud detecting section 32 are provided. Department
Although it is necessary to arrange the ball detector 32 vertically, in this embodiment, the ball detector 31 and the fraud detector 32 can be mounted close to the printed circuit board 36, so that the thickness of the detector main body 26 is reduced. Therefore, the game ball detector 24 can be thinned.

Although the embodiments of the present invention have been described above, the present invention is not limited to the embodiments.
For example, in the embodiment, the case where the starting means 13 is provided with a game ball is illustrated, but the game ball detector 24 is provided for each of the other game components.
May be provided. In addition, the ball sensing unit 31 and the fraud sensing unit 32
A permanent magnet and a coil may be used, and the induced voltage of the coil is changed by a change in the magnetic field of the permanent magnet. In addition, ball sensing unit 31 and fraud sensing unit 32
May use a Hall element.

As long as the electrical physical quantity changes in response to a change in an electromagnetic wave or a magnetic field, it is possible to use different elements for the ball sensing unit 31 and the fraudulent sensing unit 32 with different operating principles. The ball detection circuit unit 33, the fraud detection circuit unit 34, and the discrimination circuit unit 35 can be configured by a single IC or the like. The detector main body 26 may not include the ball passage hole 27 in a part thereof, and may be configured to be arranged on one side of the ball passage 22 formed in the winning means or the like.

[0039]

According to the first aspect of the present invention, when the game ball B passes, the game ball B changes due to a change in electrical physical quantity.
The sphere detection unit 45 that detects the passage of an electromagnetic wave or a fraudulent detection unit 46 that detects fraudulent changes due to changes in electrical physical quantities when responding to an electromagnetic wave or a magnetic field. In addition to being able to detect, small game parts can be easily incorporated with a simple structure, and there is an advantage that they can be manufactured easily and inexpensively. According to the second aspect of the present invention, when the game ball B passes, the ball detection unit 45 detects the passage of the game ball B by a change in the electrical physical quantity, and the game is performed so as not to be insensitive by the passage of the game ball B. Since it has a fraud detection unit 46 which is arranged to be separated from the passage side of the ball B and detects fraud by a change in electrical physical quantity based on the same operation principle as the ball detection unit 45, it is possible to prevent radio waves There is an advantage that fraud can be reliably detected, and even small game parts can be easily incorporated with a simple structure, and can be manufactured easily and at low cost.

According to the third aspect of the present invention, since there is provided the discriminating circuit section 35 for discriminating an improper act when a detection signal is received from each of the detecting sections 45 and 46, it is possible to surely determine whether or not the improper act has occurred. Can be determined. According to the fourth aspect of the present invention, the ball detecting section 45 is provided with a ball sensing section 31 whose electric physical quantity changes when the game ball B passes, and a game based on a change in the electric physical quantity of the ball sensing section 31. A ball detection circuit unit 33 for detecting the passage of the ball B; a fraud detecting unit 46; a fraud detecting unit 32 whose electrical physical quantity changes in response to an electromagnetic wave or a magnetic field; and a fraud detecting unit 32
And a fraud detection circuit unit 34 for detecting fraud by a change in the electrical physical quantity of the game ball B.
Can be easily and reliably detected by the fraud detector 46 and the electromagnetic wave or the magnetic field, respectively.

According to the fifth aspect of the present invention, the sphere detecting section 45, the fraud detecting section 46 and the discriminating circuit section 35 are incorporated in the detector main body 26. Four
5. The fraud detection unit 46 and the discrimination circuit unit 35 can be protected. According to the present invention as set forth in claim 6, a sphere passage hole 27 is formed at one longitudinal end of the detector main body 26, and a sphere sensing unit 31 is provided near the sphere passage hole 27. Since the fraud sensing units 32 are respectively arranged on the other ends that are separated from each other, the entirety including the detector main body 26 can be configured to be thin.

[Brief description of the drawings]

FIG. 1 is a front view of a ball game machine showing a first embodiment of the present invention.

FIG. 2 is a sectional view of a starting means according to the first embodiment of the present invention.

FIG. 3 is a front view of a starting unit according to the first embodiment of the present invention.

FIG. 4 is a perspective view of a game ball detector according to the first embodiment of the present invention.

FIG. 5 is a cross-sectional view of the game ball detector showing the first embodiment of the present invention.

FIG. 6 is a block diagram showing a first embodiment of the present invention.

FIG. 7 is a sectional view of a game ball detector showing a second embodiment of the present invention.

[Explanation of symbols]

 26 Detector body 27 Ball passage hole 31 Ball detection section 32 Fraud detection section 33 Ball detection circuit section 34 Fraud detection circuit section 35 Discrimination circuit section 45 Ball detection section 46 Fraud detection section B Game ball

Claims (6)

[Claims] 1. A ball detector (45) for detecting the passage of a game ball (B) by a change in an electrical physical quantity when the game ball (B) passes.
A game ball detector for a ball game machine, comprising: a fraud detector (46) for detecting fraud by changing an electrical physical quantity when responding to an electromagnetic wave or a magnetic field. 2. A ball detector (45) for detecting the passage of a game ball (B) by a change in an electrical physical quantity when the game ball (B) passes.
Game ball so that it is not sensitive to the passage of the game ball (B)
(B) arranged at a distance from the passing side and a ball detecting unit (45)
A game ball detector for a ball game machine, comprising a fraud detector (46) for detecting fraud by a change in an electrical physical quantity based on the same operating principle as described above. 3. The sphere according to claim 1, further comprising a discriminating circuit unit (35) for discriminating a fraudulent action when a detection signal is received from each of the detecting units (45) and (46). Gaming ball detector for gaming machines. 4. A sphere detecting section (45) whose electric physical quantity changes when a game ball (B) passes through the sphere detecting section (45), and the sphere detecting section (31) changes the electric physical quantity of the sphere detecting section (31). A ball detection circuit section (33) for detecting the passage of the game ball (B), and a fraud detection section (46).
In addition, a fraud sensing unit (32) in which an electrical physical quantity changes in response to an electromagnetic wave or a magnetic field, and a fraud detection circuit unit (34) that detects fraud based on a change in the electrical physical quantity of the fraud detecting unit (32). A game ball detector for a ball game machine according to any one of claims 1 to 3, further comprising: 5. A sphere detecting section (45) inside a detector main body (26),
The game ball detector for a ball game machine according to any one of claims 1 to 4, wherein a fraud detection unit (46) and a discrimination circuit unit (35) are incorporated. 6. A ball passage hole (27) is formed at one end in the longitudinal direction of the detector body (26), and a ball sensing unit (31) is provided near the ball passage hole (27). 31) The fraud sensor on the other end away from
The game ball detector for a ball game machine according to any one of claims 1 to 5, wherein (32) is arranged respectively.